Ensign Portable Storage Bins "Porta-stors" is a cost-effective method of providing temporary storage of free-flowing and non-free flowing materials. With standard capacities ranging from 20cuft to 60cuft, Porta-stors offer a space saving method to hold a reserve capacity of material while also keeping your plant floor clean and organized. Ensign’s heavy duty construction provides a reusable and stackable robust alternative to traditional Gaylord boxes. Extremely versatile and configurable these storage vessels can be equipped with numerous options, adapters, and other add-ons to meet your process requirements.